Index: wp-includes/pluggable.php
===================================================================
--- wp-includes/pluggable.php	(revision 23348)
+++ wp-includes/pluggable.php	(working copy)
@@ -356,6 +356,7 @@
 			}
 			$phpmailer->AddAddress( $recipient, $recipient_name);
 		} catch ( phpmailerException $e ) {
+			trigger_error( $e->getMessage(), E_USER_NOTICE );
 			continue;
 		}
 	}
@@ -378,6 +379,7 @@
 				}
 				$phpmailer->AddCc( $recipient, $recipient_name );
 			} catch ( phpmailerException $e ) {
+				trigger_error( $e->getMessage(), E_USER_NOTICE );
 				continue;
 			}
 		}
@@ -396,6 +398,7 @@
 				}
 				$phpmailer->AddBcc( $recipient, $recipient_name );
 			} catch ( phpmailerException $e ) {
+				trigger_error( $e->getMessage(), E_USER_NOTICE );
 				continue;
 			}
 		}
@@ -439,6 +442,7 @@
 			try {
 				$phpmailer->AddAttachment($attachment);
 			} catch ( phpmailerException $e ) {
+				trigger_error( $e->getMessage(), E_USER_NOTICE );
 				continue;
 			}
 		}
@@ -450,6 +454,7 @@
 	try {
 		$phpmailer->Send();
 	} catch ( phpmailerException $e ) {
+		trigger_error( $e->getMessage(), E_USER_NOTICE );
 		return false;
 	}